How the system recognize 10am and 10pm?
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compare date in MySQL using php.
I have a db that store a datetime using php code:
date("Y-m-d h:i:s", time()+(3600*8))
The date stored is 2005-12-12 05:49:07 . Time now is 05:49 pm.
If I want to looks for record that are between 10am - 5pm today, what php code should I use?
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Answers
for the php part, either you use the H instead the h for the 24 hour notation, OR you put the AM/PM modifier using a or A
http://php.net/date
Try this one
<?
$first = date("Y-m-d H:i:s", mktime(10,0,0));
$second = date("Y-m-d H:i:s", mktime(17,0,0));
$result = array();
$query = mysql_query("SELECT * FROM table WHERE date BETWEEN $first AND $second;") or die(mysql_error());
while ($row = mysql_fetch_assoc($query))
$result[] = $row;
}
print_r($result);
?>
Its searching for records between 10 and 17 o'clock..
If you have any control over this program, and how it is getting into the database, rembmer that you do not have to read this out of a database, only a computer does. So keep your inserts into the database in a computer readable format. By that I mean, it would be better to put it in this format YYYYMMDDHHMMSS.
Then you could put an index on that column, and then say SELECT * FROM $tablename WHERE date > '20050505000000';
By indexing that column, and putting in that format, you can really speed up searching.
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by: angelIIIPosted on 2005-12-12 at 01:57:17ID: 15465139
please look here to learn how to compare date and times in MySQL:
http://dev.mysql.com/doc/r